PE43204MLIBA RF Attenuator Equivalent & Substitute Parts

Part Overview

The PE43204MLIBA is a fixed RF attenuator manufactured by pSemi, designed for RF signal attenuation applications in the 50 MHz to 3 GHz frequency range. This component provides 18dB attenuation with 50 Ohm impedance in a compact 12-VFQFN package with exposed pad. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

PE43204MLIBA

pSemiIn Stock: 1418PE43204MLIBA Datasheet

Current PartRFQ

PE43205B-Z

pSemiIn Stock: 19347PE43205B-Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PE43204MLIBA is determined by the following critical parameters:

• Attenuation Capability: The substitute must provide 18dB attenuation or be capable of delivering 18dB within an adjustable range
• Impedance Matching: 50 Ohm impedance is mandatory for RF circuit compatibility
• Frequency Coverage: The substitute must support the 50 MHz to 3 GHz operating range
• Package Compatibility: Physical form factor and pin configuration must be compatible with existing PCB layouts
• Manufacturer Continuity: pSemi UltraCMOS® series components maintain design consistency and performance characteristics

The PE43205B-Z qualifies as a substitute because it maintains the same impedance specification, operates within an extended frequency range that encompasses the original part's operating band, and provides the required 18dB attenuation level within its adjustable range.

Parameter Comparison

Engineering Selection Recommendations

The PE43205B-Z is the designated substitute for the obsolete PE43204MLIBA. Selection is based on the following engineering criteria:

• Product Status: The PE43205B-Z maintains active production status, ensuring long-term availability and supply chain continuity
• Compliance: The PE43205B-Z is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements
• Functional Equivalence: Both components share identical impedance (50 Ohms) and operate within overlapping frequency ranges. The PE43205B-Z's adjustable attenuation range (0dB ~ 18dB) encompasses the fixed 18dB specification of the PE43204MLIBA
• Package Consideration: The PE43205B-Z uses a 12-WFQFN package versus the 12-VFQFN of the original part. PCB layout verification is required to confirm physical compatibility

Frequently Asked Questions (FAQ)

Q: Can the PE43205B-Z directly replace the PE43204MLIBA in existing designs?

A: Electrical substitution is valid based on impedance, frequency range, and attenuation capability. However, the package variant (12-WFQFN versus 12-VFQFN) requires PCB layout verification to confirm pin-to-pad alignment and mechanical fit.

Q: What is the primary difference between these two attenuators?

A: The PE43204MLIBA provides fixed 18dB attenuation, while the PE43205B-Z offers adjustable attenuation from 0dB to 18dB. The PE43205B-Z also operates across a wider frequency range (35 MHz ~ 6 GHz versus 50 MHz ~ 3 GHz).

Q: Are there any compliance differences between the two parts?

A: The PE43205B-Z is ROHS3 compliant and REACH unaffected. The PE43204MLIBA compliance status is not specified in available documentation. Both components share identical MSL ratings and ECCN classifications.

Q: What should be verified before implementing the PE43205B-Z as a substitute?

A: Verify PCB footprint compatibility for the 12-WFQFN package, confirm that the adjustable attenuation range meets circuit requirements when set to 18dB, and validate that the extended frequency range does not introduce unintended signal coupling in the application.